CVE-2023-23397KEV · OVERDUECWE-20

Microsoft Outlook Elevation of Privilege Vulnerability

Critical · published March 14, 2023

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 9.8. It is confirmed in active exploitation. It sits in the 99.9th percentile for exploit probability.

1298
days past CISA
deadline
CVSS v3.1
9.8
EPSS
97%
Percentile
99.9
In the wild
Confirmed
What it is

🚨 A crafted email can turn your Outlook into a hacker's playground! This elevation of privilege vulnerability in Microsoft Outlook is a game changer for attackers. 🔥 Think of it like a waiter at a restaurant who not only takes your order but also has the ability to access the kitchen and change the menu! If they can sneak in, they can whip up whatever dish they want—trouble brewing for everyone. With this vulnerability, an attacker could elevate their privileges and gain unauthorized access to sensitive information, potentially compromising entire systems! It's a recipe for disaster, allowing them to manipulate data or intercept communications from your Outlook at will. The consequences could be absolutely devastating for any organization!

Put simply

Think of it like a waiter at a restaurant who not only takes your order but also has the ability to access the kitchen and change the menu! If they can sneak in, they can whip up whatever dish they want—trouble brewing for everyone. This vulnerability allows attackers to exploit Outlook through specially crafted emails, giving them the ability to execute code with elevated privileges. Essentially, it means that if you're tricked into opening such an email, the attacker can take control as if they were you!

What to do

With this vulnerability, an attacker could elevate their privileges and gain unauthorized access to sensitive information, potentially compromising entire systems! It's a recipe for disaster, allowing them to manipulate data or intercept communications from your Outlook at will. The consequences could be absolutely devastating for any organization! Immediate action is crucial! Update Microsoft Outlook to the latest version to patch this vulnerability. Additionally, educate your team to be wary of suspicious emails and enable advanced email security features to block malicious content. 💡 You've got this! By taking these steps, you can protect your organization and keep those hackers at bay! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.97159 · 99.9th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2023-03-14T16:55Z
KEV added
2023-03-14 · due 2023-04-04
EPSS history
Timeline
  • 14 MAR 16:55Z
    Microsoft Outlook Elevation of Privilege Vulnerability
    cvelistv5
  • 14 MAR 00:00Z
    Added to CISA KEV — remediate by Apr 4
    kev